diff --git a/lib/utils/ipi/aclint_mswi.c b/lib/utils/ipi/aclint_mswi.c
index a3de2f5..832e223 100644
--- a/lib/utils/ipi/aclint_mswi.c
+++ b/lib/utils/ipi/aclint_mswi.c
@@ -74,7 +74,7 @@ int aclint_mswi_cold_init(struct aclint_mswi_data *mswi)
 
 	/* Sanity checks */
 	if (!mswi || (mswi->addr & (ACLINT_MSWI_ALIGN - 1)) ||
-	    (mswi->size < ACLINT_MSWI_SIZE) ||
+	    (mswi->size < (mswi->hart_count * sizeof(u32))) ||
 	    (mswi->first_hartid >= SBI_HARTMASK_MAX_BITS) ||
 	    (mswi->hart_count > ACLINT_MSWI_MAX_HARTS))
 		return SBI_EINVAL;